错误日志

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Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(25.3.1) from [com.android.support:design:25.3.1] AndroidManifest.xml:27:9-31
is also present at [com.android.support:support-v4:26.0.0-alpha1] AndroidManifest.xml:27:9-38 value=(26.0.0-alpha1).
Suggestion: add 'tools:replace="android:value"' to <meta-data> element at AndroidManifest.xml:25:5-27:34 to override.

解决方法

修改依赖com.android.support为统一版本